INT 10 - SOLLEX SuperVGA - DISPLAY OUTPUT CONTROL - GET DISPLAY OUTPUT
        AX = 7F02h
        BL = 01h
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                    BX = display output setting (see AX=7F02h/BL=00h)
                    CX = displays attached (see below)
                01h failed
SeeAlso: AX=7F00h,AX=7F02h/BL=00h

Bitfields for displays attached:
 bit 0  PS/2 display on analog output
 bit 1  multi-frequency monitor on analog output
 bit 2  LCD panel attached
 bit 3  plasma/electroluminescent panel attached
 bit 4  multi-frequency monitor on digital output
 bit 5  Enhanced Color Display attached to digital outpt
 bit 6  alternate display
 bits 15-7 reserved

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